Samsung SGH-A737 Service Manual page 67

9-2-12. UMTS1900 Transmitter
**If you check the tx chain,
Check the not only RF Device but also resistor, inductor and capacitor.
Tx ON
RF output : 4408 CH
OUT PWR : 22dBm
U104 check
pin#46 ≥ -10dBm
YES
F202 check
pin#1 ≥ -10dBm ?
YES
PAM201 Check
Pin#8 ≥ 24dBm ?
YES
U202 Check
Pin #2 ≥ 22dBm ?
YES
F204 Check
Pin #2 ≥ 22dBm ?
YES
THE END
NO
NO
NO
NO
NO
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This Document can not be used without Samsung's authorization
U104 Resolder or change
F202 Resolder or change
PAM201 Resolder or change
U202 Resolder or Change
F204 Resolder or Change
9-33
Flow Chart of Troubleshooting